हिंदी

How Does the Heat H Produced by a Current Passing Through a Fixed Resistance Wire Depend on Magnitude of Current I? - Science

Advertisements
Advertisements

प्रश्न

How does the heat H produced by a current passing through a fixed resistance wire depend on magnitude of current I?

Advertisements

उत्तर

Heat produced by a current passing through a wire with a fixed resistance depends on the square of current, I.
Heat, H = I2 x R x t

shaalaa.com
  क्या इस प्रश्न या उत्तर में कोई त्रुटि है?
अध्याय 1: Electricity - Exercise 8

APPEARS IN

लखमीर सिंग Physics (Science) [English] Class 10
अध्याय 1 Electricity
Exercise 8 | Q 1

वीडियो ट्यूटोरियलVIEW ALL [1]

संबंधित प्रश्न

In which direction do electrons flow?


If 20 C of charge pass a point in a circuit in 1 s, what current is flowing?


If the current through a floodlamp is 5 A, what charge passed in 10 seconds?

(a) 0.5 C
(b) 2 C
(c) 5 C
(d) 50 C


A 5 V battery is connected to two 20 Ω resistors which are joined together in series.

(a) Draw a circuit diagram to represent this. Add an arrow to indicate the direction of conventional current flow in the circuit.
(b) What is the effective resistance of the two resistors?
(c) Calculate the current that flows from the battery?
(d) What is the p.d. across each resistor?


Ten bulbs are connected in a series circuit to a power supply line. Ten identical bulbs are connected in a parallel circuit to an identical power supply line. 

(c) In which circuit, if one bulb blows out, all other will stop glowing?


Draw a circuit diagram showing two electric lamps connected in parallel together with a cell and a switch that works both lamps. Mark an â’¶ on your diagram to show where an ammeter should be placed to measure the current.


A switch must be connected in:
(a) Live wire (b) neutral wire
(c) earth wire (d) either earth or neutral wire


In the network shown in the following adjacent Figure, calculate the equivalent resistance between the points.  

  1. A and B
  2. A and C

 


Draw a schematic diagram of an electric circuit consisting of a battery of two cells each of 1.5 V, 5 Ω, 10 Ω and 15 Ω resistors and a plug key, all connected in series.


What is fuse? Name the material of fuse.

Explain briefly how a fuse protects an electric circuit.

Under what circumstances does one get an electric shock from an electrical gadget?

Name the unit which a consumer pays as the cost of electricity.

Define the following:

Electromotive force


Explain the meaning of the term kilowatt hour.

An electric bulb is rated 250 W, 230 V. 

  1. the energy consumed in one hour, and
  2. the time in which the bulb will consume 1.0 kWh energy when connected to 230 V mains.

Three heaters each rated 250 W, 100 V are connected in parallel to a 100 V supply of the energy supplied in kWh to the three heaters in 5 hours.


Water : pipe :: Electric current : ______.


An ammeter is always placed in parallel with the circuit.


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×